Mongo Connection Exception handling - exception

Question

I am trying to make some exception handling on the following code. Basically I want a MessageBox.Show("ErrorMessage") to show if the connection to the server can't be established.
public List<MongoDBModel> MongoDBModel
{
get
{
string connectionString = "mongodb://127.0.0.1";
var mongoClient = new MongoClient(connectionString);
var mongoServer = mongoClient.GetServer();
var databaseName = "TestPointToPoint";
var db = mongoServer.GetDatabase(databaseName);
var mongodb = db.GetCollection<MongoDBModel>("OCS.MeterEntity");
var mongodbQuery = Query<MongoDBModel>.EQ(x => x._id, MeterUID);
List<MongoDBModel> Cursor = mongodb.FindAs<MongoDBModel>(mongodbQuery).ToList();
return Cursor;
}
}
I have already tryed with
if (mongoServer.State == MongoServerState.Connected)
{
var databaseName = "TestPointToPoint";
var db = mongoServer.GetDatabase(databaseName);
var mongodb = db.GetCollection<MongoDBModel>("OCS.MeterEntity");
var mongodbQuery = Query<MongoDBModel>.EQ(x => x._id, MeterUID);
List<MongoDBModel> Cursor = mongodb.FindAs<MongoDBModel>(mongodbQuery).ToList();
return Cursor;
}
else
{
MessageBox.Show("Connection to MongoDB lost");
return null;
}
but that did not work since the state of the mongoServer first changes to connected in the query.
What should I do to make it work?

Answer 1

I feel stupid now :P
Using a simple try-catch worked.
public List<MongoDBModel> MongoDBModel
{
get
{
string connectionString = "mongodb://127.0.0.1";
var mongoClient = new MongoClient(connectionString);
var mongoServer = mongoClient.GetServer();
var databaseName = "TestPointToPoint";
var db = mongoServer.GetDatabase(databaseName);
var mongodb = db.GetCollection<MongoDBModel>("OCS.MeterEntity");
try
{
var mongodbQuery = Query<MongoDBModel>.EQ(x => x._id, MeterUID);
List<MongoDBModel> Cursor = mongodb.FindAs<MongoDBModel>(mongodbQuery).ToList();
return Cursor;
}
catch (MongoConnectionException e)
{
MessageBox.Show(e.Message);
return null;
}
}
}
Sorry for your troubles.